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Implementing Zero-Downtime Blue-Green Deployment with Docker Compose & Nginx

By IT From Zero April 15, 2026

Don't let customers see 502 errors every time you update code. Discover the secret to simple Blue-Green Deployment with Docker Compose and Nginx for true Zero-Downtime.

Centos

Live Patching Kernel Vulnerabilities on CentOS Stream 9 with kpatch: Security Updates Without Reboots

By IT From Zero April 15, 2026

Install and use kpatch on CentOS Stream 9 for 'hot' kernel security patching. Live Patching ensures 100% uptime by fixing vulnerabilities without restarting your server.

MySQL

MySQL Performance Tuning: Boosting Speed with Buffer Pool and Thread Pool in Practice

By IT From Zero April 15, 2026

Expert secrets for practical MySQL optimization: Configuring Buffer Pool, Thread Pool, and Redo Log to speed up queries, reduce Disk I/O, and stabilize systems during high traffic.

Development

RabbitMQ + Python: The ‘Lifesaver’ Solution to Eliminate Application Lag for Background Tasks

By IT From Zero April 15, 2026

Learn how to use RabbitMQ and Python for professional background task processing. An optimal solution to reduce latency, increase scalability, and ensure data safety for backend applications.

Ubuntu

Installing ZFS on Ubuntu: The ‘Lifesaver’ for Peace of Mind and Data Security

By IT From Zero April 15, 2026

ZFS is a top-tier storage solution offering absolute data protection through Snapshots and RAID-Z. Learn how to install and optimize ZFS on Ubuntu for professional-grade storage.

Docker

Using Dive to Inspect Docker Image Layers: How I Slimmed Down an Image from 1.5GB to 120MB

By IT From Zero April 15, 2026

Learn how to use Dive to dissect Docker image layers, identify junk files, and optimize image size from 1.5GB to 120MB through a real-world example.

Security

Gitleaks Installation Guide: The “Shield” to Prevent Secret and API Key Leaks in Git

By IT From Zero April 15, 2026

Don't let API key leaks ruin your career. A detailed guide on installing Gitleaks to automatically detect and prevent secret exposure in Git repositories.

VMware

The Ultimate Fix for I/O Lag: Converting VMware Thin to Thick Provisioning

By IT From Zero April 15, 2026

Is your VMware system lagging due to I/O latency? Learn how to convert from Thin to Thick Provisioning using vSphere Client and vmkfstools to optimize performance for SQL Server and Databases.

Development

Building Real-time Applications with WebSocket and Node.js: From Chat Apps to 10,000 CCU Dashboards

By IT From Zero April 14, 2026

Learn how to build real-time applications from Chat Apps to professional monitoring Dashboards. This article shares experiences in handling memory leaks, scaling with Redis, and optimizing performance for 10,000+ connections.

Docker

Goodbye var_dump: How to Properly Configure Xdebug in Docker and VS Code

By IT From Zero April 14, 2026

Learn how to set up Xdebug in Docker and connect it to VS Code for professional PHP debugging. Eliminate var_dump and save 40% of your bug-hunting time.

Optimizing Redis RAM with HyperLogLog and Bloom Filter: Counting and Deduplicating at Scale

Building an Event-Driven Microservices System with Apache Kafka and NestJS: From Producer and Consumer to Dead Letter Queue (DLQ)

Installing and Configuring Rootless Docker: Run Docker Without Root to Protect Your Host

Configuring a PPPoE Server on Linux Using rp-pppoe for ISP Labs

A Guide to DiskCache in Python: Safe Multi-Process Disk Caching Without Redis

How to Configure Host sFlow on Linux: Real-Time Network Traffic and KVM Monitoring

Diagnosing and Resolving Deadlocks in PostgreSQL: Inspecting Lock Trees and Configuring Proper Timeouts

ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

Guide to VFIO PCIe Passthrough on Linux KVM: GPU Passthrough for Windows VMs

Integrating OpenTelemetry into Python: Practical Microservices Monitoring Strategies

Implementing Zero-Downtime Blue-Green Deployment with Docker Compose & Nginx

Live Patching Kernel Vulnerabilities on CentOS Stream 9 with kpatch: Security Updates Without Reboots

MySQL Performance Tuning: Boosting Speed with Buffer Pool and Thread Pool in Practice

RabbitMQ + Python: The ‘Lifesaver’ Solution to Eliminate Application Lag for Background Tasks

Installing ZFS on Ubuntu: The ‘Lifesaver’ for Peace of Mind and Data Security

Using Dive to Inspect Docker Image Layers: How I Slimmed Down an Image from 1.5GB to 120MB

Gitleaks Installation Guide: The “Shield” to Prevent Secret and API Key Leaks in Git

The Ultimate Fix for I/O Lag: Converting VMware Thin to Thick Provisioning

Building Real-time Applications with WebSocket and Node.js: From Chat Apps to 10,000 CCU Dashboards

Goodbye var_dump: How to Properly Configure Xdebug in Docker and VS Code